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Hey guys,

I'm new to owning my 2006 V8 AWD XC90. Now that it is winter and I'm trying to blow hot air I've discovered that I can't. I can get mildly warm air on the passenger side, but no "warm" air on the driver side at the same time. I've very gently cleaned the air intake around the thermistor and that didn't change anything. I've noticed that the when I change the temperature dial there is a very audible noise with the blend door actuator seeming to struggle.

I'm thinking that I may want to replace the heater core, but I'd like to do some more diagnostics. Tips? Also, does anyone know how to get your hands on Vida/Dice?

Thanks for the help in advance.

Respectfully,
Titus
 

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first thing in heat related issues is to check the coolant level. low coolant will equal low heat.

if that checks out fine, then the next thing is to check the actual temperature of the coolant. an infra red thermometer gun works well for this. check the temps at the radiator as well as the heater core.

if that checks out, then you can begin to suspect the control module or blend doors. not really familiar with the volvo system, more familiar with the bmw dual zone set ups, but the basics are the same regardless of make or model.

hope this is helpful.





df
 

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V70 02/2007 auxiliary heater with all start/stop options Billstein B12 kit Xc90 brakes abl retrofit
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Flush or renew the heathercore inside the cabin Lots of how-to’s on YouTube
 

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Flush or renew the heathercore inside the cabin Lots of how-to’s on YouTube
What he said. My heat sucked last year when I bought mine with 125k on it. New heater core and I now have heat. You can f around with laser heat guns or whatever else if you'd like, or just replace the core. I wouldn't waste time trying to do a flush.

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